rename_column

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 469
        def rename_column(table_name, column_name, new_column_name) # :nodoc:
          clear_cache!
          execute("ALTER TABLE #{quote_table_name(table_name)} #{rename_column_sql(table_name, column_name, new_column_name)}")
          rename_column_indexes(table_name, column_name, new_column_name)
        end